Three doctors warn of an epidemic of medical diagnoses fostered by the "medicalization of everyday life", improvements in medical technology and an increasing emphasis on identifying those at 'risk' of a disease. "Perhaps most worrisome is the medicalization of childhood. If children cough after exercising, they have asthma; if they have trouble reading, they are dyslexic; if they are unhappy, they are depressed; and if they alternate between unhappiness and liveliness, they have bipolar disorder.